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MDEV-10748 Server crashes in ha_maria::implicit_commit

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Problem was in a combination of LOCK TABLES on several Aria
tables followed by an ALTER TABLE. After the ALTER TABLE there
was a force close + reopen of the alter table. The close failed
because the table was still part of a transaction.

Fixed by calling extra(HA_EXTRA_PREPARE_FOR_FORCED_CLOSE) as
part of closing the table, which ensures that the table is not
anymore part of the current transaction.
This commit is contained in:
Monty 2019-10-15 20:26:40 +03:00
parent 4d14785546
commit 7952f7720f
3 changed files with 40 additions and 3 deletions
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12
mysql-test/suite/maria/lock.result
View file

@ -109,4 +109,16 @@ ALTER TABLE t1 ADD UNIQUE KEY (f1);
ERROR 23000: Duplicate entry 'foo' for key 'f1'
ALTER TABLE t1 ADD KEY (f2);
DROP TABLE t1;
#
# MDEV-10748 Server crashes in ha_maria::implicit_commit upon ALTER TABLE
#
CREATE TABLE t1 (a INT, b INT) ENGINE=Aria;
SELECT * FROM t1;
a b
CREATE TABLE t2 (c INT) ENGINE=Aria;
LOCK TABLE t2 READ, t1 WRITE;
ALTER TABLE t1 CHANGE b a INT;
ERROR 42S21: Duplicate column name 'a'
UNLOCK TABLES;
DROP TABLE t1, t2;
# End of 10.2 tests

17
mysql-test/suite/maria/lock.test
View file

@ -118,4 +118,21 @@ ALTER TABLE t1 ADD UNIQUE KEY (f1);
ALTER TABLE t1 ADD KEY (f2);
DROP TABLE t1;
--echo #
--echo # MDEV-10748 Server crashes in ha_maria::implicit_commit upon ALTER TABLE
--echo #
CREATE TABLE t1 (a INT, b INT) ENGINE=Aria;
SELECT * FROM t1;
CREATE TABLE t2 (c INT) ENGINE=Aria;
LOCK TABLE t2 READ, t1 WRITE;
--error ER_DUP_FIELDNAME
ALTER TABLE t1 CHANGE b a INT;
# Cleanup
UNLOCK TABLES;
DROP TABLE t1, t2;
--echo # End of 10.2 tests

14
sql/sql_base.cc
View file

@ -2426,9 +2426,17 @@ Locked_tables_list::reopen_tables(THD *thd, bool need_reopen)
{
if (!table_list->table || !table_list->table->needs_reopen())
continue;
/* no need to remove the table from the TDC here, thus (TABLE*)1 */
close_all_tables_for_name(thd, table_list->table->s,
HA_EXTRA_NOT_USED, (TABLE*)1);
for (TABLE **prev= &thd->open_tables; *prev; prev= &(*prev)->next)
{
if (*prev == table_list->table)
{
thd->locked_tables_list.unlink_from_list(thd, table_list, false);
mysql_lock_remove(thd, thd->lock, *prev);
(*prev)->file->extra(HA_EXTRA_PREPARE_FOR_FORCED_CLOSE);
close_thread_table(thd, prev);
break;
}
}
DBUG_ASSERT(table_list->table == NULL);
}
else